Grain-sieve



D. F. PEHRSSON.

GRAIN SIEVE. APPLICATION FILEDADEC.2. i919.

' Patend Aug-9, 1921.

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DANIEL r. rnnassoiv, or BUFFALO, NORTH DAKOTA.

GRAIN-SIEVE.

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Specieation of Letters Patent.

iatented Aug. 9, 1921.

Substitute for applicationSeral No. 97,112, led May 12, 1916. This application 'filed December 2, 1919. i

Serial No. 342,030.

To all whom t may concern:

Be it known that l, DANIEL F. FnHRssoN, a citizen of the United States, residing at Buffalo, in the county of Cass, State of North Dakota, have invented certain new and useful improvements in Grain-Sieves; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. z

This invention relates to grain sieves, and particularly to a sieve ada'ptedfor separating oats from other grain.

rFhe object of the invention resides in the provision of a sieve ofthe character Vnamed in which the oats which become lodged in the passages of the sieve may be removed without the necessity of manually extracting same, it being a well known fact that the use of a nail or pin in eXtracting oats from the passages of sieves of this type is injurious to the sieve both as respects its shapes an wearing qualities.

With the above and other .objects in view the invention consists in the details of construction and in the arrangment and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claims.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the several views, and/in which,

Figure 1 is a bottom plan view of a fragment of a grain sieve constructed in ac cordance with the invention.

Fig. 2, a section on the line 2 2 of Figi;

Fig. 3, a view similar to Fig. 2 with the top plate swung to a position to permit the movement of relatively long\grain such as oats through the passages of the sieve, such position of the parts being resorted to when it is desired to clean the passages of the sieve ofthe presence of oats and dirt, and

Fig. 4, is a plan view of one of the blanks employed in lforming the spacing plates of the sieve.

Referring to the drawings, the frame of inclination with respect to their'width, the upper or higher edge of one strip extending above or beyond the lower edge of the adjacent strip. Disposed between adjacent strips 14 and' extending longitudinally of the side members 10 and 11 is a plurality of spacing plates A, said plates being arranged in spaced relation and forming in conjuncton with the strips 14 the passages of the sieve as will be obvious. Each of the spacing plates A embodies a body portion 15 upper and lower tongues 16 and 17 respectively` and a lower extension 18. The tongues 16 and 17 are engaged through slits formed in adjacent strips 14 and are then clenched upon said strips and in `this man? ner the spacing plates are secured to the strips 14. The extension 18 of each spacing plate bears at its inner edge against the lower edge of the adjacent strip 14 and eX- tends a considerable distance beyond the lower edgeof said strip. Mounted upon the lower side of the cross member 13 are spaced ears 19 and 20 to which are pivoted re-k spectively arms 21 and 22 of a U-shaped member B, which latter also includes an arm connecting portion 23. The arms 21 and 22 Aare connected by a pluralityv of spaced strips 24 which when swung to the positionshown in Fig. 2 bear against the lower ends lof respective rows of spacing plates A and provide the passages of the sieve with an angular portion at the lower ends of said passages, itlbeing obvious that the strips 24 when in the position shown in Fig. 2 serve as stops to preventthemove ment of relatively long grainsjthrough the passages vof the sieve, it being impossible for such relatively long grains to turn in the angular portion of the passage although round grains are free to move into such an gular portions df the passages. The arm connecting portion 27 of the Us'shaped member B is provided with a tongue 25 over which is adapted to engage the head of a screw 26 mounted in the cross member l2. When the head of the screw 26 is engaged over the tongue 25 it will be apparent that the strips 24 will be locked in the position in Fig. 2. The head of the screw l26 is provided with a cut away portion 27 and when said screw is rotated to position the cutl away portion l27 adjacent the tongue 25 the U-shapedmember B and srips 24 will be released for pivotal movement to the position shown in Fig. 3. If it is desired to remove the long grain and dirt lodged in the passages of the sieve it is only necessary to dispose the parts as shown in Fig. 3 and vibrate the sieve. During this vibration of the sieve all material in the passages thereof is free to move through such passages and in this manner the sieve is effectually cleaned without the necessity of extracting material from the passages thereof through the medium of a nail or pin.

hat I claim is:

l. A grain sieve having a plurality of inclined grain passages through it, the lower wall of each of which passages terminates at its discharge end short of the upper wall of the passage, a stop plate for each passage across the discharge end of the passage in spaced relation to the discharge end of the bottom wall of the passage and extending at its lower end beneath the bottom wall of its corresponding passage and a movable support for the stop plates by which they are simultaneously movable into and out of their respective positions.

2. A grain sieve having a plurality of grain passages through it, the lower wall oif each of which passages terminates short of the upper wall, and a stop plate for each passage movable into and out of position across the discharge end of the passage and in spaced relation to the bottom wall of the passage, whereby to permit of passing ofv to the discharge end of the bottom wall of the passage, whereby to permit of passing of grain from the passage, each stop plate extending at its lower end beneath the bot-V tom wall of its corresponding passage and in spaced relation thereto.

In testimony whereof I aiiixmy signature, in the presence of two witnesses.

DANIEL F. PEHRSSON. Vitnesses:

' JOHN G. PFEFFER, MINNIE L. KYELL. 

